Question

write the define of mirror .

Answer 1

A mirror  is a polished surface in which, after striking, the light is reflected.

The simplest is the Plane mirror. In the latter, a beam of parallel rays of light can change direction altogether and continue to be a beam of parallel rays, thus producing a virtual image of an object with the same size and shape as the real one. The image turns right but inverted on the normal mirror axis.

There are also curved mirrors that can be concave or convex. In a concave mirror whose surface forms a paraboloid of revolution, all rays incident parallel to the axis of the mirror, are reflected through the focus, and those that pass through the focus, are reflected parallel to the axis.

Mirrors are objects that reflect almost all the light that hits their surface due to this phenomenon we can observe our image in them. The mirrors are actually crystals that contain a layer of aluminum behind (or other material, but it is easier for aluminum).

♦ Types of Mirrors:

⊕ Plane Mirror
⊕ Spherical Mirror

→ Plane Mirror 

A plane mirror is a highly polished flat surface that can reflect the light that comes with a reflecting capacity of 95% (or higher) incident light intensity. The flat mirrors are used frequently. They are what we use every morning to see ourselves.

→ Spherical Mirror

Spherical mirrors are of two types i.e Concave and Convex.

♦ Concave Mirror:

A concave mirror, or convergent mirror, has a reflective surface that is curved inwardly (approaching the light source that impinges on it). The concave mirrors reflect the light making it converge into a focal point. They are used to focus the light. Unlike convex mirrors, concave mirrors show images of different shapes depending on the distance between the object and the mirror.

♦ Convex Mirror:

A convex mirror, fish-eye mirror or divergent mirror is a curved mirror in which the reflecting surface is deformed towards the light source. Convex mirrors reflect the light outwards, therefore they are not used to focus light. 

Good Studies!

Answer 2

♠What is Mirror?

→Mirror is a polished surface , which reflects all the light which incidents on it and this phenomenon of refelecting back of light by mirror is known as Reflection of Light.
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Types Of Mirror →

There are two Types of mirror →

♠ Plane Mirror
♠ Spherical Mirrors
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Plane Mirrors →

Plane mirrors is a mirror whose reflecting surface is plane. Image formed by a plane mirror is always virtual , erect and equal in size as that of the object.

The Image formed by plane mirror has following properties →

1. It is always virtual and erect.

2. The size of image is equal to that of object.

3. The image is formed far behind the mirror because the object is in front of it.

4.The linear magnification produced by a plane mirror is 1.

5. The focal length of a plane mirror is infinity.
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Spherical Mirrors →

The reflecting surface of Spherical Mirrors are part of a hollow glass sphere and it is highly polished.

There are two types of Spherical Mirrors →

Concave Mirror →

The Concave Mirror is the mirror whose reflecting surface is inwards and it's outer surface is polished. It is also known as Converging mirror , because it converges the light passing through it.

Convex Mirror →

The Convex Mirror's refelecting surface is outwards and inner surface is polished. It is also called Diverging Mirror , because it diverges the light passing through it.

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